DESMAF at high speeds

Decipha's custom GUFX strategy covers all 89-93 foxbody ecu's including the 88 mass-air california ecus.
88gthatchback
Posts: 9
Joined: 2021 Apr 18, 09:58
Location: CA
Vehicle Information: 88 Mustang - A9L2

DESMAF at high speeds

Unread post by 88gthatchback »

Around town everything seems ok but when at freeway speeds DESMAF is at .22 and acts like cruise control not letting the RPM come down. DESMAF doesn't come down until after coming to a stop. Is there anything with ISC that relates to MPH?
decipha
Posts: 4957
Joined: 2021 Feb 15, 12:23
Location: Metairie, LA
Vehicle Information: Work Truck
'19 F-150 3.3L

Re: DESMAF at high speeds

Unread post by decipha »

dasmin but thata not your issue

desmaf that low you need to dial in idle air and dashpot
88gthatchback
Posts: 9
Joined: 2021 Apr 18, 09:58
Location: CA
Vehicle Information: 88 Mustang - A9L2

Re: DESMAF at high speeds

Unread post by 88gthatchback »

Dashpot was the problem. For some reason I messed with the higher rows and didn’t know what I was doing. I put it back to original and all is good now.
Post Reply